Optimization of machining parameters of ultrasonic rolling extrusion bearing ring based on MOCS algorithm
To improve the surface performance of the bearing ring,the orthogonal tests were designed taking 42CrMo as the test material.Based on the test results,the response surface prediction model for surface roughness,residual compressive stress and hardness was estab-lished.Through variance analysis,the model which has certain predictive value was verified.The multi-objective cuckoo search(MOCS)algorithm was employed to optimize the response surface prediction model,and the optimal ranges of processing parameters and surface per-formance of ultrasonic rolling extrusion were obtained.The reliability of the optimization results was verified through tests.The results show that the optimal ranges of processing parameters are:rotational speed of[300,420]r·min-1,feed speed of[17,25]mm·min-1,ampli-tude of[15,21]μm,static pressure of[460,620]N.The optimal ranges of surface performance are:surface roughness of[0.313,0.483]μm,residual compressive stress of[925,1052]MPa,hardness of[755,821]HV.
surface performanceultrasonic rolling extrusion42CrMoresponse surface methodMOCS algorithm
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